Computational modeling of grounding systems transient response using equivalent circuits
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| Autores: | , , , |
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| Formato: | artículo original |
| Fecha de Publicación: | 2021 |
| Descripción: | To enable the modeling of grounding systems in systemic studies and transient calculations and to increase the accuracy and reliability of the models used, equivalent circuits must be studied in order to enable the representation of dynamic effects, frequency dependence of soil parameters and soil ionization. In this sense, this paper presents a methodology that combines electromagnetic simulation solved by finite-element method (FEM) with a time-domain optimization step, which makes it possible to obtain equivalent circuits for grounding systems in the design stage. The methodology was evaluated using two case studies. Initially, three different circuit topologies had their parameters adjusted from simulations of the response of a single-rod grounding system for different levels of soil resistivity. The proposed methodology proved to be flexible and adequate to the represent soils with a wide range of resistivity values, with error levels lower than 2%. Then, the applicability of the methodology to model a non-linear response associated with soil ionization was demonstrated. The results show that the insertion of improved circuit models allows for greater reliability in the planning of electrical power systems. |
| País: | RepositorioTEC |
| Institución: | Instituto Tecnológico de Costa Rica |
| Repositorio: | RepositorioTEC |
| Lenguaje: | Español |
| OAI Identifier: | oai:repositoriotec.tec.ac.cr:2238/13632 |
| Acceso en línea: | https://revistas.tec.ac.cr/index.php/tec_marcha/article/view/6026 https://hdl.handle.net/2238/13632 |
| Palabra clave: | Circuit models electromagnetic transients frequency dependence of soil Parameters grounding system ground potential rise ionization Aterramento parâmetros do solo elevação do potencial de terra ionização modelos de circuito transitórios eletromagnéticos |